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Integration of Visual Information in Auditory Cortex Promotes Auditory Scene Analysis through Multisensory Binding

Atilgan, H; Town, SM; Wood, KC; Jones, GP; Maddox, RK; Lee, AKC; Bizley, JK; (2018) Integration of Visual Information in Auditory Cortex Promotes Auditory Scene Analysis through Multisensory Binding. Neuron , 97 (3) 640-655.e4. 10.1016/j.neuron.2017.12.034. Green open access

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Abstract

How and where in the brain audio-visual signals are bound to create multimodal objects remains unknown. One hypothesis is that temporal coherence between dynamic multisensory signals provides a mechanism for binding stimulus features across sensory modalities. Here, we report that when the luminance of a visual stimulus is temporally coherent with the amplitude fluctuations of one sound in a mixture, the representation of that sound is enhanced in auditory cortex. Critically, this enhancement extends to include both binding and non-binding features of the sound. We demonstrate that visual information conveyed from visual cortex via the phase of the local field potential is combined with auditory information within auditory cortex. These data provide evidence that early cross-sensory binding provides a bottom-up mechanism for the formation of cross-sensory objects and that one role for multisensory binding in auditory cortex is to support auditory scene analysis.

Type: Article
Title: Integration of Visual Information in Auditory Cortex Promotes Auditory Scene Analysis through Multisensory Binding
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuron.2017.12.034
Publisher version: https://doi.org/10.1016/j.neuron.2017.12.034
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Attention, auditory cortex, auditory-visual, binding, cross-modal, ferret, multisensory, sensory cortex, visual cortex
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > The Ear Institute
URI: https://discovery.ucl.ac.uk/id/eprint/10043429
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